One year my sister-in-law attempted to make Jell-O eASTER eGGS USING REAL EGGS AS THE MOLD - THE RECIPE CAME ON THE BOX.
dAMN cAPSLOCK!

Anyway...
She made pin holes in each end of the egg, stuck in a skewer to break the yolk, shook it up really well and blew out the contents. She should have let them dry out for a week or two because the Jell-O eggs were coated with egg slime - pretty but too revolting to eat even after washing.